Effect of vinylene carbonate as electrolyte additive for Mn2O3/NiMnO3 anodes of lithium-ion batteries


Solmaz R., Karahan B. D.

IONICS, cilt.27, sa.7, ss.2813-2824, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 7
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s11581-021-04044-7
  • Dergi Adı: IONICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
  • Sayfa Sayıları: ss.2813-2824
  • Anahtar Kelimeler: Lithium-ion battery, Negative electrode, Electrolyte, Vinylene carbonate, SEI layer, SURFACE-FILM FORMATION, ELECTROCHEMICAL PERFORMANCE, FLUOROETHYLENE CARBONATE, LI-ION, NANOSTRUCTURED MATERIALS, PROPYLENE CARBONATE, GRAPHENE OXIDE, STORAGE, NICO2O4, SEI
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

This study reports for the first time the production and characterization of Mn2O3/NiMnO3 (MO/NMO) powders by the hydrothermal method and the enhanced performance of this electrode upon the addition of 15 vol% vinylene carbonate (VC) into the electrolyte. Cyclic voltammetry and electrochemical impedance spectroscopy tests show that the lithiation mechanism of MO/NMO changes upon the presence of VC in the electrolyte. The galvanostatic tests' results reveal that when half-cells have been tested with 15 vol% VC-containing electrolyte the anode delivers higher discharge capacity (793 mAh g(-1) at 100 mA g(-1), 535 mAh g(-1) at 400 mA g(-1)) and capacity retention, in comparison to that of the standard electrolyte. Finally, XRD and post-SEM analyses' outcomes substantiate that the addition of VC into the standard electrolyte promotes the formation of a stable electrode/electrolyte interface. The improved solid electrolyte interface (SEI) properties caused by VC addition prevent any peel off and/or delamination, resulting in high electrochemical performance over cycles.